The stator windings can be divided into two types: centralized and distributed according to the different shapes and wiring modes of the windings. The winding and embedding of centralized windings is simpler, but the efficiency is low and the performance is poor. At present, most of the AC motor stator are distributed windings, according to the different types of machines, models and winding process conditions, the motor design of different types of windings and specifications, so the technical parameters of the windings are not the same.